Shuttle for ribbon looms



April "8, 1958 s. WIGET 76 SHUTTLE FOR RIBBON LOOMS Filed April 26, 1956INVENTOR. 7

United States Patent 6 SHUTTLE FOR RIBBON LOOMS Georg Wiget, Arbon,Switzerland, assignor to Adolph Saurer Ltd., Arbon, SwitzerlandApplication April 26, 1956, Serial No. 580,917 Claims priority,application Switzerland June 22, 1955 8 Claims. (Cl. 139-498) Thisinvention relates to looms, and more particularly to shuttles for ribbonlooms wherein bobbins cylindrically wound up on carriers and wound offoutside the shuttles, are employed.

It is an object of the invention to provide novel shuttles of theabove-noted kind whereby to materially simplify and shorten theprocedure for replacing bobbins.

Other objects, and the manner in which the same are attained, willbecome apparent as this specification proceeds.

Up to now, bobbins usually were placed on spindles for free rotationinside the shuttles, and special braking de vices had to be providedthrough which the thread had to pass. The complexity of thisconstruction, and the cumbersome and time consuming procedure of drawingthe thread into the braking devices, were serious drawbacks which areentirely eliminated by the present invention.

The invention contemplates a shuttle comprising two plane faces joinedat an angle of at least about 90, and a spring cover designed to force abobbin, on insertion in the shuttle, against the two plane faces so thatas the diameter of the bobbin decreases, the axis of the bobbin, whichextends parallel to the two plane faces, moves in the plane bisectingthe angle formed by the two plane faces, toward the zenithal line ofthis angle, whereby the friction generated in the lines of contact ofthe mantle of the bobbin with the two plane faces and the cover,determines the tension of the thread.

An advantageous elaboration on this basic concept of the invention,provides on the shuttle an eyelet for withdrawal of the thread whichextends in the line of intersection of the two angularly displaced planefaces, at least approximately over the entire wound up length of thebobbin; a slit is provided at one end of this eyelet, for threadingpurposes.

In the drawing accompanying this application and forming part thereof,one embodiment of the invention is illustrated diagrammatically by wayof example.

In the drawing:

Fig. 1 is a front view of a shuttle according to the invention, with abobbin inserted therein;

Fig. 2 is a side view of the shuttle (seen from the left in Fig. l), and

Fig. 3 is a section along line III-III in Fig. 1.

Referring now to the drawing wherein like elements are denoted byidentical reference numerals, the shuttle 1 includes two plane faces 2and 3 extending at right angles with respect to one another, and twoparallel guide faces 4 and 5 extending at right angles relative to faces2 and 3. The face 3 ends in a rounded portion 6. The central part offace 2 extends, at an angle, to an end portion 7. A longitudinal slot 8accessible, from the left in Fig. 1, through the threading slit 9,extends in the line of intersection of plane faces 2 and 3. The cover 10is pivotally mounted, by means of a pin 12, in the two guide faces 4 and5. The spring 14 tends to turn the cover 10 clockwise.

2,829,6lb Patented Apr. 8, 1958 ICC portion 6 from where it passes tothe place of consumption.

As the diameter of the bobbin decreases, the axis 17 of the carrier 13for the bobbin 15 moves in the plane bisecting the angle formed by thetwo plane faces 2 and 3, toward the zenithal line, or apex, of theangle, a path indicated by the arrow in Fig. 3, and leading to theterminal position of the carrier 18 indicated in a dot and dash line inFig. 3.

In accordance with the basic concept of the invention, the tensioning ofthread 16 is determined by the friction between bobbin 15 and the planefaces 2 and 3, and the cover 10. This eliminates the necessity ofproviding any accessory braking mechanism for the thread, and simplifiesand expedites the exchange of bobbin in the shuttle.

I wish it to be understood that I do not desire to be limited to theexact details of construction, design and operation shown and describedas certain modifications Well within the scope of the claims followingherein, may suggest themselves to workers in this field which wouldinvolve no departure from the spirit of the invention nor any sacrificeof the advantages thereof.

I claim:

1. A shuttle for ribbon looms comprising a bottom, a rear wall formingan angle of at least about with said bottom, plane faces on said bottomand said rear wall, means for forcing a bobbin into contact with saidplane faces whereby to move the axis of said bobbin toward the apex ofsaid angle as the diameter of said bobbin decreases, and means forpassing the thread issuing from the circumference of said bobbin outsidesaid shuttle.

2. A shuttle for ribbon looms comprising a bottom, a rear wall formingan angle of at least about 90 with said bottom, plane faces on Saidbottom and said rear wall, a spring loaded cover arranged to force abobbin into contact with said plane faces whereby to move the axis ofsaid bobbin toward the apex of said angle as the diameter of said bobbindecreases, and means for passing the thread issuing from thecircumference of said bobbin outside said shuttle.

3. A shuttle for ribbon looms comprising a bottom, a rear wall formingan angle of at least about 90 with said bottom, plane faces on saidbottom and said rear wall, means for forcing a bobbin into contact withsaid plane faces whereby to move the axis of said bobbin toward the apexof said angle as the diameter of said bobbin decreases, and alongitudinal slot extending along the zenithal line of said angle over alength corresponding substantially to the wound-up length of the bobbin,for passing the thread issuing from the circumference of said bobbinoutside said shuttle.

4. A shuttle for ribbon looms comprising a bottom, a rear wall formingan angle of at least about 90 with said bottom, plane faces on saidbottom and said rear wall, side walls parallel to one another andperpendicular to said bottom and said rear wall, adapted to serve asguide faces for the top and bottom, respectively, of a bobbin insertedtherebetween, means for forcing said bobbin into contact with said planefaces whereby to move the axis of said bobbin toward the apex of saidangle as the diameter of said bobbin decreases, and means.

for passing the thread issuing from the circumference of said bobbinoutside said shuttle.

5. A shuttle for ribbon looms comprising a bottom, a rear wall formingan angle of at least about 90 with said bottom, plane faces on saidbottom and said rear wall, means for forcing a bobbin into contact withsaid plane faces whereby to move the axis of said bobbin toward the apexof said angle as the diameter of said bobbin decreases, a longitudinalslot extending along the zenithal line of said angle over a lengthcorresponding substantially to the Wound-up length of the bobbin, forpassing the thread issuing from the circumference of said bobbin outsidesaid shuttle, and a rounded extension at the top of said rear wallacross which to guide the thread emerging from said longitudinal slot.

6. A shuttle for ribbon looms comprising a bottom, a rear Wall formingan angle of at least about 90 with Sa bottom, plane faces on said bottomand said rear wall, means for forcing a bobbin into contact with saidplane faces whereby to. move the axis of said bobbin toward the apex ofsaid angle as the diameter of said bobbin decreases, a longitudinal slotextending along the zenithal line of said angle over a lengthcorresponding substantially to the wound-up length of the bobbin forpassing the thread issuing from the circumference of said bobbin outsidesaid, shuttle, and a slit at one end of said longitudinal, slot wherebyto facilitate threading.

7. A shuttle for ribbon looms comprising a bottom,v

a rear wall forming an angle of at least about 90 with said bottom,plane faces on said bottom and said rear Wall, an upwardly bentextension of the central part of said bottom, means for forcing a bobbininto contact with said plane faces whereby to move the axis of saidbobbin toward the apex of said angle as the diameter of said bobbindecreases, and means for passing the thread issuing from thecircumference of said bobbin outside said shuttle.

8. A shuttle for ribbon looms comprising in combination, a bottom, arear wall forming an angle of at least about 90 with said bottom, planefaces on said bottom and said rear wall, parallel side walls arrangedperpendicular to said bottom and said rear wall, a spring-loaded covermounted for pivotal displacement relative to said side walls, anupwardly bent extension of the central part of said bottom, a roundedextension at the top of said rear wall, and a longitudinal slotextending along the zenithal line of the angle formed by the bottom andthe rear wall over a length corresponding substantially to the wound-uplength of a bobbin, whereby on insertion of a bobbin into the shuttle,said cover forces the bobbin into frictional contact with said planefaces thus controlling the tension on the thread, said thread emergingfrom said longitudinal slot to pass across the exterior of said rearwall and the rounded terminal portion thereof.

No references cited.

